Being very bored at work, I've decided to do a little research on possible exhaust systems for my '88 SE. Basically what I'm interested in is something that's not too loud (but meaner if that makes any sense lmao), and a slight gain in hp is always good https://www.nopistons.com/forums/pub...IR#>/happy.png.



What interests me the most is the Bönez Dual Cat System from Rx7.com ... Click Here

AND

The RP 50mm Cat-back also from Rx7.com ... Click Here



I was thinking that this would possibly not be too loud since it is a dual cat system, and the cat-back kind of looks a stock so it can't be too crazy.



What do you think?

Shaun

that and a cold air intake...

Yes...Breathe in...Breathe out...

based on the fact that you still want emissions, i'm guessing you are going for a clean looking, quick car that is still senseable. if that is the case, i'd go with the racing beat cat back. they make one of the best exhaust systems for RX-7's, and if you sell your car, the system will increase the value of the car, or you can re-sell the exhaust and get a large amount back for it.



it is quality, made from durable stainles steel construction that will last.



http://www.racingbeat.com/Images/16420b.jpg



here is the link: http://www.racingbeat.com/resultset....rtNumber=16420



as for cat replacements, i'd be a little hesitant about the bonez stuff. i'm sure the quality isn't bad, but i dont think RP has the time or engineering experience to design one of the best replacement cats and still sell it for cheap.



you might try the mazdatrix header / cat combo. i'm not sure how loud they will be, but teh headers will give you more power, and the cat should muffle the sound some, while increaseing power since it is "high flow"



here is the link: http://www.mazdatrix.com/e-gray.htm



mazdatrix also sells other exhaust systems like HKS and Racing Beat:



cat back: http://www.mazdatrix.com/e86-92.htm



complete racing true dual systems (plus sound clips): http://www.mazdatrix.com/r-ex86nt.htm



corksport also carries lots of mufflers and what not that you can check out:



http://www.corksport.com/main.php3?primNavIndex=1&



HOPE THESE HELP YOU WITH YOUR SEARCHES! https://www.nopistons.com/forums/pub...IR#>/bigok.gif

I think you would really like the racingbeat exhaust by your description.



If you haven't already done reliability mods do those first.

I dont think i've ever heard a racing beat on a NA, anyone have a video or clip or something?



:o

I have the Bonez cats for my car. Don't rely on it for emissions testing. Mine failed both times it has been inspected with it on. To pass I had to remove it, put stock cats back on and it passed with flying colors, in fact one gas was barely detectable it passed so well, so don't rely on it for emmisions. In fact I am thinking of going with a straight pipe and just switching out for emissions testing.



Now as far as Catbacks, I paid a lot but I have what I think is one of the nicest catbacks made. Now granted I paid an arm and a leg and was probably ass-raped for it too but I am veyr happy with the money spent. I purchased the Greddy 60/80mm Power extreme catback from RX7.com. I had to wait for 3 months to get it because they do it on a bulk order status so they have to wait until enough are ordered to make them. It is made of unbelieveable quality and has a great exhaust note (I wish I could record it). Plus it is huge and flows amazingly free.



Here are some photos of the ass-end of the system. I can get others if you wish.

The bonez exhaust at rx7.com is over priced. It is basically the dyno max mufflers painted black.



I paid 275 for my old dyno max muffler system. It is the same design as the HKS ones just not stainless.



I would get the racing beat over all, quiet but nice sound and it lasts for ever.



Next up would be also the borla cat back. which is all stainless stell and will last for ever too

Wow I wasn't expecting so many replies! Thanks Guys https://www.nopistons.com/forums/pub...IR#>/bigok.gif



gazellis: God damn that's a sexy ass lol. But $900 I find is a little steep.



RX7Aggie: Lots of info there ... You rock! Now you got me wanting the Complete Dual Exhaust System With The Racing Beat Mufflers. I haven't gotten to watch the video clip since I am at work. I'm pretty sure it's pretty damn loud since it includes headers and all, if you've listened to it how bad (or should I say good lol) is it? I'll listen to it when I get home.



I also just realized that installation for an exhaust system is going to be impossible to find here in Montreal, Qc. No one works on rotaries! Bloody Canadians Eh? (No offence to any Canadian, I'm Canadian too lol) I think something like this should be done professionally.



Thanks Guys!

you could probably find a used one a little bit cheaper somewhere.

Installation is pretty easy.. I'm sure you could do it yourself.. Or take a trip down Hamilton area and I'll do it for you?

Hamilton is pretty far, my Rx-7 has 37000 original miles on it lol. I'd end up putting like 1000 miles in a weekend https://www.nopistons.com/forums/pub...R#>/unsure.png lol. Thanks for the offer though. Looks like I've joined up with the right community.



Thanks Again https://www.nopistons.com/forums/pub...IR#>/bigok.gif

Using that combination at full throttle above 3500 RPM is so loud that person in the car behind you will start to bleed from the ears. It sounds worse than a GSXR750 with a Yoshimura pipe and NO BAFFLE in an enclosed garage. That cat "may" muffle the sound some, but if it were any louder it would kill somebody. I've got to lay down now. I feel woosey.

Just got a chance to listen to the "Complete Dual Exhaust System With The Racing Beat Mufflers" ... Whoa ... That's pretty load lmao. Is that streetable??



Link To Video

I have the full Racing Beat set-up on my 89 N/A; 2 into 1 header, presilencer and the affore mentioned and pictured catback. I was also concerned about the noise level as the car is a ragtop, but to my surprise the exhaust tone is tame. The true dual exhaust is much louder in my opinion especially with moderate to extreme port work



https://www.nopistons.com/gallery/al...-R1-035-16.jpg

So you've basically got the same system as what's being sold at the mazdatrix link posted above? I also just noticed that's listed in the Race section ... That system is getting "scarier" by the minute ... but very very Intriguing lmao.

I would also pick up a K&N drop in filter. Gotta let it inhale more, and exhale more. Unless you have already done this, my mistake.



G'luck. And doing an exhaust is not too hard to do, just takes time and tools. Oh yes, and hand cleaner also. KEEP your stock exhaust. Don't sell it.



Anywho, good luck with yours.

the mazdatrix one in the video is a true dual, which should be louder then the normal racing beat catback and things.



check out the racing beat site maybe?



http://www.racingbeat.com/FRmazda2.htm

Exactly, true dual is louder. I opted for the other, not a bad system.

how about a turbo

hmmm... these are all dual exhausts, are there any single exhuasts (that can have good gains)?



All of the exhausts i've seen are dual exhausts.



Call me weird, but I dont really like duals.

Personally I prefer duals to singles any day. But there are single systems. I think, correct me if I'm wrong, the A’pexy N1 is a single setup. They've got it over at rx7.com ... Click Me



89 Rag when you say other do you mean the "Complete "Single" Exhaust System"?

here is the borla, which i heard is a real nice system. it's not too pricey either. i have the racing beat complete system for my TII, and i love it. somewhat quiet, but still opens up WOT. if i didn't get it, i'd get the borla, which a number of RX-8 owners have been raving about.



http://www.borla.com/automotive/?cartID=20...6128.194.43.243



some random dude's review of the borla exhaust: http://www.lemmings.com/mark/rx7borla.htm

RX7Aggie: Is the exhaust you have the one at the top, or bottom of the mazdatrix link you gave me ... Click Here



All this talk about exhaust setups has made me pretty confused lol. Thanks a lot.



Take Care

you could bring it down to kingston, and i can install it for you for a case of beer in the mechanical engineering building's parking lot.

=)

A case o' beer sounds like a good deal ... how about 10??? https://www.nopistons.com/forums/pub...1047683329.gif Although, kingston is still a tad far. When it comes to Rx7s living in Montreal sucks lol.



Now that all the ricers have brought out all those "beautiful" loud ass civics https://www.nopistons.com/forums/pub...1047683358.gif ... I think I've decided to go with the Complete Dual Setup and hopefully shatter their damn windshields when I drive right by them lmao.



Although, coasting home in neutral at night doesn't sound very appealing. So, from what I've understood the "Complete "Single" Exhaust System" has a tamer exhaust note.

Here's how Mazdatrix describes the "Dual" and "Single" setups...



Dual:





Single:



So from what I understand the "Dual" actually has two separate exhaust pipes that go all the way to the mufflers, and the "single" joins to one then a pre-silencer then a "Y" pipe then mufflers. Is that correct or am I just going crazy? I've been reading so much I've confused myself lmao https://www.nopistons.com/forums/pub...IR#>/blink.png.



Thanks a lot for your patience lol.

Shaun

This is a two into one. The individual exhaust ports flow into separate header tubes, which are then collected into a single tube. Typically the single tube feeds a main cat or a presilencer, followed by the y-pipe and individual mufflers.

http://www.racingbeat.com/photos/16010.jpg

This is a two into two. The individual exhaust ports flow into separate header tubes, which are never come together. They go into separate presilencers (we hope) and separate mufflers.

http://www.racingbeat.com/photos/16001.jpg

Either way you’ll need to plumb in an O2 sensor bung somewhere.

I think I've made up my mind ...



I want to go with this setup from Racing Beat:



- 1986-92 RX-7 (Non-turbo) Streetable Header/Collector

- Power Pulse Presilencer 1986-88 RX-7 Manual - Non-turbo

- 1986-92 Non-turbo Street Exhaust System



That is what I want but I don't know if going with:



- Catalytic Converter Replacement Pipe with Presilencer

- 1986-92 Non-turbo Street Exhaust System



Would be a little "Tamer" ...



Thanks a lot everyone for all your help, it has really made my research a lot simpler.

I've had both. I still have the header. The header is a more powerful modification. Noticeably more powerful. If you still have the OEM precat and main cat, the precat is probably empty. Over time, the catalyst material (it looks like netting) breaks away from the precat shell and lodges itself in the openng of the main cat. If nothing else, you may wish to drop the precat, reach into maincat, an remove that exhaust resticting netting.

So you suggest I go for the top setup ...



- 1986-92 RX-7 (Non-turbo) Streetable Header/Collector

- Power Pulse Presilencer 1986-88 RX-7 Manual - Non-turbo

- 1986-92 Non-turbo Street Exhaust System



The only thing stopping me from placing my order right now is I'm afraid of getting pulled over every time I drive out of my driveway lol. Oh yeah, and I don't quite understand the whole 5th & 6th port installation part of it.



Shaun

What year car? If it's an 89+ the six port actuators run off the air pump. If it's an S4, the presilencer has an air tube which, will alledgedly work but someone with an S4 would be better positioned to give you the voice of experience.



Don't forget the O2 sensor bung. If you just order the header from RB it won't have one. If you order fro Dave Gibson, he will weld one (if you remember to request it). If you decide to run the header with a cat, you'll need a short pipe fabbed because the header isn't long enough, but that short pipe is an excellent place to put the O2 sensor

I went to Dave's website (http://www.speedmachineperformance.com) and I sent an email to sales@speedmachineperformance.com. Now I'm just waiting for him to get back to me with what he recommends.



Thanks for all your help.



BTW my car's an '88 SE.

When did RB stop putting an O2 bung in the streetable header? The last three headers I've bought for different year RX-7's all not only have the bung but a piece of wire and a connecter to replace/extend from the stock location.

the streetable still has it as far as I know, the road race one doesn't

Yeah but that exhaust is for the t2, i have an 87 se.

No it's not ... scroll down to the Cat-Backs they're good for any model ...

Hey everybody,



Thanks for all your help. I've pretty much decided to go with this setup(All By Racing Beat):



- 1986-92 RX-7 (Non-turbo) Streetable Header/Collector

- Power Pulse Presilencer 1986-88 RX-7 Manual - Non-turbo

- 1986-92 Non-turbo Street Exhaust System



If it wasn't for all your help I'd still be going crazy trying to figure what the hell I should do. Everyone's help was very appreciated https://www.nopistons.com/forums/pub...IR#>/bigok.gif



Now if only I could figure out what to do for an intake lmao https://www.nopistons.com/forums/pub...IR#>/happy.png ...



Thanks guys!

If you don't feel confident installing it yourself, I'm sure any muffler shop could do it. There's really not much different about the physical aspect of a rotary exhaust, what I mean is it's still just nuts and bolts, and rubber hangers. The hardest part would probably be removing the old stuff, as it gets rusted in place.